<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .con {
            width: 300px;
            line-height: 36px;
            height: 36px;
            padding-left: 20px;
            border: 1px solid tomato;
            border-radius: 25px;
            margin: 20px auto;
        }
    </style>

</head>

<body>
    <button>警告</button>
    <button>成功</button>
    <button>错误</button>

    <!-- <div class="con">
        我是警告框
    </div> -->
    <script src="./lib/require.js" data-main="main"></script>
</body>

</html>